background stamps (full size and builder size)
clean and simple look
kraft cardstock
bees
sentiments with two kinds of fonts
larger sentiments
rounded corners
gingham (not trendy, but it is on the cover of this month's Martha Stewart magazine, so I'm hoping by listing it here, you will mistake it for a trend and make it a trend...)
embossed backgrounds
felt

Do NOT like:

staples
rows of large ruffled ribbon
huge flowers
pom poms and other items that belong on curtains
weird stuff on cards, like game pieces...

things that could go south on me fast if we overdo it:

sun
clouds
balloons

I'm with Joan on the gingham - I love it and use it all the time,and I DO NOT do "country." If Martha likes it, maybe it's on its way up!